Means and method for making paper tubes or the like



y 28, 1929- s. BERGSTEIN 1,714,541

MEANS AND METHOD FOR MAKING PAPER TUBES OR THE LIKE Filed May 31, 1927 I5 Sheets-Sheet y 1929- s. BERGSTEIN 1,714,541

MEANS AND METHOD FOR'MAKING PAPER TUBES OR THE LIKE Filed May 31, 1927 ,5 Sheets-Sheet 2 May 28, 1929.

S. BERGSTEIN MEANS AND METHOD FOR MAKING PAPER TUBES OR THE LIKE 3 Sheets-Sheet 'Filed May 31, 1927 Patented May 28, 1929.

U ED s 1:1.

' F flit.

SAMUEL BERGSTEIN, 0F JMIDDLETOWN, OHIO.

. MEANS AND METHOD FOR u i Application filed May 31,

Fig. 3 is a sectional view on line 3-'-3 of Fig. 1;

Fig. 4 is a view of the machine in side elevation;

Fig. 5 is a detail view of the thread defining'mechanism;

Fig. 6 is a detail View of the completed tube; a

Fig. 7 is a detail sectional View of the tube showing the thread formation;

Figure 8 is a detail View of the reinforcement winding mechanism.

The objects attained in the invention consist in means and method for applying a reinforcing element, as cord or wire, to spirally wound paper tubes, coincident with thelr formation, the reinforcement serving also,

and more especially, as means for applying end caps to the tubes. 7

The means for applying the cord or wire to the tubes, either material being suitable for attaining the objects of the invention, consist in an attachment adapted tot-be applied to a well known type of spiral paper tube forming machine, which acts to wind the reinforcing element spirally on the tube as the same is'being formed, the cord or wire winding attachment being operated at greater speed than the speed at which the tube is rotated in the process of formation,

thus acting to effect a spiral of less degree orless lead of the reinforcing element than that of the strips of material from which the tube is formed.

The "reinforcing element, as herein described, is wound at a suitable lead for effecting a thread on the tube adapted for receiving threaded metal caps for closing the ends of the tubes as the same are cut into suitable lengths for use. The cord or wire,

as the case may be, being wound on the tubes under tension, and with an application of adhesiveor an outer covering of the tube NG PAPER TUBES OR THE LIKE.

1922. Serial No. 195,462.

material, if desired, the same adheres. firmly. to the tubes and serves as a reinforcement and end cap retainer for the tubes of relatively. great strength.

As the reinforcing element is applied coincident with the formation of the tubes and without slowing down production, only the cost of the reinforcing material is added to the production cost, the small added cost being more than offset by the adaptation of the tubes without further operations or added material for receiving the end caps. The greater strength and durability of the, reinforced tubes, having particular reference to the improved method for closing the ends of the tubes, is very desirable in containers of a this character, especially in the larger sizes ing of the tubes, the ends of the. tubes or the end caps may be given an application of adhesive as the caps are applied.

The thread winding mechanism is here shown as applied to a well known type of spiral paper tube forming machine which, briefly described, comprises a suitable frame structure including opposite rails 1 mounted on legs 2 and having at one end a base plate 3 which carries the spindle 4 to which is secured one end of the mandrel 5 uponwhich the tube is formed and from which it is delivered as formed, the opposite end of the mandrel being unsupported. Mounted loosely upon spindle 4 are a pair of pulleys 67, the pulley 6 being traversed by a belt 8 from a pulley on any suitable drive shaft. The hub of pulley 6' has secured to it a spur gear 9 which meshes with a gear 10 on a stud 11 supported in an arm 12 projecting from the base 'rest on the opposite rails 1 and are provided with depending bolts 22 which pass through bars 23 bearing against the under sides of rails 1, the bolts being provided with nuts 24 for securing bars 21 in any position to which they have been adjusted longitudinally on rails 1.

Upon each transverse bar 21 is pivotally mounted a swinging bar 25 by means of a bolt 26, the bolts being in line axially with shafts 19. The outer ends of the swinging bars 25 carry clamps 27 engaging with segmental ribs 28 formed on bars 21, the stems of the clamps being threaded and provided with nuts 29 so that the swinging bars 25 can be adjusted on the carrying bars 21 and secured in osition after being adjusted.

uided on Ways at the outer ends of the swinging bars 25 are slides 30 having bearings for vertical shafts 31 and also for horizontal shafts 32, the inner ends of the latter having hearings in posts 33 near the inner ends of the swinging bars 25. Each shaft 32 has at its inner end a bevel gear 34 meshing with a bevel gear 18 on a shaft 19, and at its outer end a bevel gear 35 meshing with a bevel gear 36 on the lower end of a shaft 31, the

gears 35 being splined on shafts 32 so that the adjustment of the slides 30 on bars 25 can be readily efiected. 4 7

Each pair of shafts 19-31 carries a pair of, belt drums 37-38 traversed-by a belt 39 which runs from theright side of one pulley to, over and around the mandrel 5 and thence to the left side of the opposite pulley, the return run of the belt crossing from pulley to pulley above the mandrel, being twisted in its course to clear the mandrel as shown in Fig. '2. That portion of each belt 39 which surrounds the mandrel follows a spiral course, the angle of which is determined by adjustment of pulleys 37-38 angularly one relative to the other, this being efiected by swinging bars 21 on bars 25 which carry the outer pulley shafts 31, the shafts 19 constituting the pivot center upon which bars 25 swing in efiecting adjustment of the pulleys, thus the adjustment can be made without tightening or slackening belts 39 or stopping the machine.

In order to tighten or slacken the presser be1ts'39 for adapting them for tubes of different diameters, the slides 30 are adjusted longitudinally on the bars 35 by means of screws having hand wheels 40 in a manner similar .to the means employed for adjusting the tool carriages of lathes, etc. s

A bracket 41 mounted on one of the side rails lcarries at its upper end a guide 42 for the strip of paper 43 which forms the inner coil of the tube, the strip being wound directly on the mandrel 5. A rod 44 is carried by arms 45 and 46, upon which are mounted guides 47-48 for strips 49-50 which form, respectively, the intermediate and outer coils of the tube which is being produced, these strips bein coated with a suitable cement before reaching the machine for effecting ad hesion between layers of the material wound v on the tube.

The strip 49 is acted on bythe first pressure belt 39 and is wound firmly around the inner coil of the tube, the strip 50 being acted on by the second belt 39 and wound in like manner on the intermediate coil of the tube, the finished tube .moving from the mandrel to mechanism, not shown, for cutting the same into suitable commercial lengths.

The thread winding mechanism comprised in the invention consists of a bracket 51 spanning the rails 1, being provided with a hollow bearing stem 52 for clearing the tube 53 as it moves along the mandrel 5, and serving to support a rotatable member 54 upon which a plurality of spools 55 of cord or wire are supported, the material being drawn ed the spools through guides 56-57, suitable'means being provided, not shown, in connection with guides 56 for applying tension on the material so th'atthe same will be drawn taut on the tube.

Rotation of the thread winder is efiected, as here shown, by a driving connection with gear 10, consisting of a pinion 58 on a shaft 59 and a chain and sprocket connection 60-61- 62 between the shaft and the rotatable mem ber 54. The reduction between gears 10-58 and between sprockets 61-62 may be of any suitable degree for efiecting the desired lead of the thread on the tube. It will be obvious i that single lead threads, or more than two threads, all having the same lead, can be Wound on the tube by the arrangement shown without change in the mechanism other than to provide for supporting the required number of spools of thread material and the guides for directing the same-to the tube.

The thread winder, as here shown, is interposed between the mechanism for winding the the outer'layer of material between threads into engagement with the intermediate layer of material as illustrated'in Figs. 6-7.

A detail of the thread follower is shown in Fig. '5; the mechanism consisting in a pressure wheel 65 supported-on an axially adjustable threaded stem 66, the stem being provided the tube. The inechanismis operably con nected to shaft 59 by a chain and sprocket.

with a head 67 and lock nut 68 for effecting the adjustments to regulate the pressure on connection 69-70-71 which serves for driv ing the mechanism at the same speed of rota tion as the thread Winding mechanism.

The effect on the tubes is illustrated in Figs.

6 7, Fig. 7 being an enlarged detail sectional View serving to illustrate the well defined thread which is produced. Thethread 56 being covered by the outer layer of material which is cemented to the intermediate layer of material, great strength for connecting the end caps 53 which are threaded with suitable allowance I made for the thread covering material to prevent tearing of the material as the caps are applied. As stated in the introduction to the detail specification, the ends of the tubes or the inside of the end caps may be given an applicaiion of cement for sealing the end caps thus to effect air-tight containers of the tubes.

Having described my invention, I claim:

1. A machine of the character described consisting in means for winding strips of material spirally for forming a tube, the tube being rotated as it is formed, and means comprising a member rotatable aroundthe tube at greater speed than that at which the tube rotates, and serving to support a thread element, as cord or wire, and acting. to Wind said ekiinent with a predetermined lead on the tu e.

2. A machine of the character described consisting in means for winding strips of material spirally for forming a tube, means operably coordinated with the strip winding means for winding a thread of cord or Wire on the tube between layers of said material and with a difierent lead than that at which the material is wound, and a follower operprovides means of relatively able over the outef layer/of material for defining the lead of said thread.

3. A machine of the character described ineluding means for windin strips of material spirally for forminga tu e, means operably coordinated with the strip Winding means for winding a thread of cord or wire on the tube between layers of said material with a diflerent lead than that at which the material is wound, and a vfollower rotatable around the tube over the outer layer of material for defining the lead of said thread.

4. A machine of the character described including means for winding strips of material spirally for forming a tube, means operably coordinated with the strip winding means for winding a thread of cord or wire on the tube between layers of said material with a different lead than that at which the material is wound, and a follower rotatable around the tube over the outer layer of material at the same speed at which the thread winder rotates, following the lead of the thread and acting between threads to press the outer material against the adjacent inner layer of material.

5. A machine of the character described consisting in means for winding strips of material spirally for forming a tube, the tube being rotated as it is formed, and means comprising a member rotatable around the tube at greater speed than that at which the tube rotates, and serving to support a thread element, as cord or wire, and acting to wind said element with a predetermined lead on the tube, the lead of the thread being variable with the change of speed of'said rotatable member. 3

In testimony whereof, I aifix my signature. 

